JP2002248501A - Rolling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rolling method by which the thickness in a portion of a different thickness can be formed uniformly even though the portion of the different thickness is formed by turning a rolling means. SOLUTION: This stay plate is made thin locally by the upper and lower rolls 64, 66 of a rolling means 60 put on a turn table 90 by holding both the ends of the stay plate 81 with a pair of clamp means and applying constant tension to the stay plate. In this case, the turning angle of the turn table is assigned θ, the turning angle θ when the upper and lower rolls are located in an orthogonal position to the longitudinal axis of the stay plate, is assigned 0 deg., when the draft load of the rolling means when the turning angle is 0 deg., is assigned P, the draft load is set to (P/cosθ) or an approximate value like this.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling method for forming a locally thickened difference thickness portion on a strip.

[0002]

2. Description of the Related Art The present applicant has previously filed Japanese Patent Application No. 11-3367.
No. 90 "Rolling machine" was proposed. In this technique, rolling is performed as described in the next figure. FIGS. 10 (a) and 10 (b) are illustrations of the procedure of rolling by the rolling device proposed earlier. (A)
First, the strip 102 is moved to the rollable rolling means 101 of the rolling device 100, and the upper and lower rolls 103, 10
The band 102 is set between the four. Then, the strip 102
The roll 103 is pressed down while applying tension while clamping the end of the thin section 106 with the clamping means 105, 105, and the thin section 106 is formed. extend.

In (b), after rolling, the thin portion 106
The plate member 107 on which is formed is taken out. By performing the rolling in this manner, the thin portion 106 having the boundary line 108 at the angle θ and the boundary line 109 at the angle β can be formed on the strip 102.

[0004]

However, in the above-mentioned conventional rolling procedure, the rolling means 101 is turned to rotate the thin portion 10.
When the boundary lines 108 and 109 of FIG. 6 are formed at angles θ and β, irregular portions 111 and 112 having large variations in the thickness e are likely to occur in the thin portion 106, and the thin portion (difference thick portion) 106 is formed.
It takes time to correct the thickness of the paper.

Accordingly, an object of the present invention is to provide a rolling method capable of uniformly forming the thickness of the thickness difference portion even when the thickness difference portion is formed by rotating the rolling means.

[0006]

In order to achieve the above object, according to the present invention, a fixed tension is applied to the band plate while holding both ends of the band plate with a pair of clamping means, and the band plate is turned on a turntable. In the rolling method in which the thickness of the turntable is locally reduced by the upper and lower rolls of the rolling means placed on the
When the upper and lower rolls are perpendicular to the longitudinal axis of the strip, the turning angle θ is 0 °, and when the turning angle is 0 °, the rolling load of the rolling means is P, and the rolling load is (P / cos θ). Or a value approximating this.

As the turning angle θ of the rolling means increases, the rolling load increases as indicated by a curve drawn by (P / cos θ) or a value approximating the curve. Even if the turning angle θ changes, it becomes almost constant, and there is no fear that the thickness variation of the thickness difference portion becomes large. Note that the approximate value refers to a value that falls within a range of 95% to 105% of (P / cos θ).

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. FIG. 1 is a plan view of a production line used in the rolling method according to the present invention.
Rewind reel 11 (also called recoiler), guide unit 1
2. A loop device 13, a rolling device 14, and a cutting machine 15 are arranged in series in this order. 16, 17, 18 are roller conveyors, 21 is a control panel, 22 is a hydraulic unit,
23 is an operation panel. 81 denotes a band plate, 81a denotes a longitudinal axis of the band plate 81, and θ denotes a turning angle.

FIG. 2 is a side view of a production line used in the rolling method according to the present invention. The rewind reel 11 sets the coil of the band plate, and returns the coil and feeds the band plate each time. The cutting machine 15 separates the strip having the thickness difference portion formed by the rolling device 14.
The rolling device 14 includes a tension device 30 and a rolling unit 60.
Consists of

The tension device 30 is movable in the X-axis direction (see FIG. 1), and is provided with an X-axis moving guide 30a,
30a, an X-axis moving base 30b placed on these X-axis moving guides 30a, 30a, and an X-axis moving base 30b.
X-axis driving means 3 shown in FIG. 1 for moving b in the X-axis direction
0c, 30c, an X-axis movement position detector 30d, and elements described in the next figure.

FIG. 3 is a perspective view of a tension device according to the present invention. The tension device 30 has a left clamp means 32, a right clamp means 33, and tension applying means 34, 35 on a movable table 31. The moving table 31 has a Y-axis moving base 38 attached to a base 36 via a first guide 37.

The left clamp means 32 includes a Y-axis moving base 3
8, a housing 41 is attached to the left side of the housing 4.
The upper pressing portion 42 is vertically movably mounted at the center of the housing 1 via a guide, the lower pressing portion 43 facing the upper pressing portion 42 is fixed, and the hydraulic cylinders 44, 44 are mounted on the upper portion of the housing 41. And the hydraulic cylinder 44
Is attached to the upper pressing portion 42, and the upper pressing portion 42 is pressed toward the lower pressing portion 43 by hydraulic pressure.

On the other hand, the right clamp means 33 includes upper and lower pressing portions 42 and 43 and a hydraulic cylinder 44 similar to the left clamp means 32 on a housing 47 mounted on the right side of the Y-axis moving base 38 via a second guide 46. , 44 are provided. 48 is a left clamp position detector and 49 is a right clamp position detector.
Reference numerals 8 and 49 are, for example, linear encoders and linear position sensors.

The tension applying means 34 is a hydraulic cylinder 51. The mounting portion 52 of the hydraulic cylinder 51 is mounted on the base 36, and the rod 53 is mounted on the Y-axis moving base 38. The tension applying means 35 is a hydraulic cylinder 55,
The mounting portion 56 of the hydraulic cylinder 55 is
And the rod 57 was attached to the right clamping means 33.

FIG. 4 is a perspective view of a rolling means according to the present invention.
The bearing boxes 63, 63 are fitted up and down freely via a bearing 62 (not shown), and work rolls 6 as upper rolls are fitted to these bearing boxes 63, 63 via bearings not shown.
4. The backup rolls 65, 65 are fitted, and the work rolls 66 as lower rolls are symmetrically mounted on the stand 61 via bearings (not shown), symmetrically with the rolls 64, 65, 65.
The backup rolls 67, 67 are fitted and the stand 61
The hydraulic cylinders 68, 68 are mounted on the upper portions of the cylinders, and the rods of the hydraulic cylinders 68, 68 are attached to the bearing boxes 63, 63.
And the work rolls 64 and 66 are attached to the roll drive unit 6.
9, 69, and has six rolls, and is a single rolling mill. 71 is a work roll position detector, 72
Is a left clamp movement limit detector, 73 is a right clamp movement limit detector, 74 and 74 are heating means, and 90 is a turntable.

The work roll position detector 71 is, for example, a linear encoder or a linear position sensor, and the left and right clamp movement limit detectors 72, 73 are, for example, limit switches. The heating means 74 is a heat source (heater) for electromagnetic induction heating (induction heating).
66 are provided on the left and right sides.

The turntable 90 has a rotation support 92 at the center of a mounting table 91 and a drive 93 at an end. The driving unit 93 includes a guide 94 attached to the mounting table 91 and a worm reducer 95 that drives the guide 94.

That is, the rolling means 60 is fitted to the rotation support portion 92 of the turntable 90 and the rolling means 6
By attaching one end of the guide 94 to the zero, the rolling means 60 is placed on the turntable 90. Reference numeral 96 denotes an origin position detector, 97 denotes a right rotation limit detector, and 98 denotes a left rotation limit detector.

Next, a rolling method according to the present invention will be described. FIGS. 5A and 5B are first explanatory views of the rolling method according to the present invention. (A): First, the strip 81 is passed through the rolling device 14. Specifically, the left clamp means 32 reaches a predetermined position by the advance (in the direction of the arrow) of the hydraulic cylinder 51 (rod 53). At this time, the excessive movement of the left clamp means 32 is prevented by the left clamp movement limit detector 72.

Next, the left and right clamping means 32, 33
When the upper hydraulic cylinders 44, 44 (rods) retreat (in the direction of the arrow), the upper pressing portion 42 rises. On the other hand, the work roll 64 and the backup rolls 65 are raised together with the bearing housing 63 by the rolling hydraulic cylinder 68 of the rolling means 60.

Then, the band plate 81 extends to the left clamping means 32.
Then, the upper pressing portion 42 of the left clamping means 32 is lowered to grip the thick portion 82 of the band plate 81.
On the other hand, the work roll 64 and the backup rolls 65, 65 are lowered on the band plate 81 by the reduction hydraulic cylinder 68.

In this case, the turntable 90 (see FIG. 4) is in a stopped state, and the turning angle θ of the turntable (see FIG. 1) is 0 °. As a result, the rolling means 60 does not rotate, and the upper and lower work rolls 64 and 66 are orthogonal to the longitudinal axis 81a of the strip 81 (see FIG. 1).
Set as The roll-down position of the work roll 64 is detected by the work roll position detector 71.

(B): Subsequently, the work roll 64 is driven and rotated at a predetermined roll speed to form the thickness difference portion 83. At the same time, by moving the left clamp means 32 in the tension direction (the direction of the arrow), a constant thickness t is applied to the strip 81 to form the thickness difference portion 83. When the left clamp means 32 reaches a predetermined position, it stops.

Subsequently, in order to reversely rotate the rolling means 60, the right clamping means 33 is moved to the vicinity of the rolling means 60, and the upper pressing portion 42 is lowered by the hydraulic cylinder 44 on the right clamping means 33 so that the strip plate is rotated. The thick part 82 of 81 is gripped.
The position of the right clamp means 33 at that time is detected by the right clamp movement limit detector 73.

FIGS. 6A and 6B are second explanatory views of the rolling method according to the present invention. (A): Subsequently, the work roll 64 of the rolling means 60 is rotated in the reverse direction to extend the thickness difference portion 83 thinner. At this time, the work roll 64 is further reduced by the reduction hydraulic cylinder 68 to control the roll interval. At the same time, the hydraulic cylinder 51
Moves the Y-axis moving base 38 in the reverse direction. When the band plate 81 moves to the upstream side by the reverse movement, the loop device 1
3 (see FIG. 2) absorbs the moving amount of the band plate 81.

(B): A constant tension t is applied to the strip 81 by moving the right clamping means 33 by the hydraulic cylinder 55 on the Y-axis moving base 38 while moving the Y-axis moving base 38 in the reverse direction. At this time, the position of the right clamp means 33 is determined by a right clamp position detector 49. Thereafter, the formation of the thickness difference portion 83 shown in FIGS. 5 and 6 is further repeated,
A difference thickness portion 83 having a desired thickness is formed.

That is, the strip 81 is gripped by the left and right clamping means 32 and 33, and the strip 81 is rolled while applying a tension t. When the tension t acts on the difference thickness portion 83, the difference thickness portion 83 can be formed on a part of the thick portion 82 of the strip 81 very easily. Further, “wrinkles” and bending that are likely to occur in the thickness difference portion 83 can be prevented by the tension t.

Next, the relationship between the rotation of the rolling means 60 and the roll will be briefly described. FIGS. 7A and 7B are third explanatory views of the rolling method according to the present invention. (A) schematically shows the relationship between the work rolls 64 and 66 and the strip 81 during rolling. As described above, the work roll 64 can be reduced by the reduction load P, and the thickness difference portion 83 can be formed. Here, the thickness of the plate before forming is T1, the thickness of the thickness difference portion 83 after forming is T2, the radius of the roll is R, and the roll contact length is Lr.

(B) shows a state in which the turntable 90 is turned as indicated by an arrow, and the turning angle θ of the turntable 90 is set to θ3. Here, assuming that the rolling means 60 is turned by the turning angle θ by turning the turntable 90 and the angle of the work rolls 64 and 66 that turn with the turning means is the roll angle, the roll angle becomes θ. Further, assuming that the sheet width before forming is b, the roll contact width is W, and the roll contact area is A, the roll contact width W is W = b / cos θ, and the roll contact area A is approximately A = It can be expressed as W × Lr. The rolling means 60 may be turned in the opposite direction as shown by the arrow. That is, when the rolling means 60 is turned, the roll contact width W increases, so that the rolling is performed while adjusting the rolling load P (see (a)) of the work roll 64.
The change of the rolling load P will be described with reference to the next drawing.

FIG. 8 is a fourth explanatory view of the rolling method according to the present invention, and is a diagram showing the relationship between the roll angle and the rolling load. The horizontal axis is the roll angle θ and the roll contact width W,
The vertical axis is the rolling load.

When the rolling means 60 is not turned, the roll angle θ is 0 °, and the roll angle θ is set to θ0 (θ0 = 0).
゜), the rolling load is set to P at the roll angle θ0. When the roll angle θ is set to θ3 (see FIG. 7B), the rolling load is increased from P to P3. That is, the rolling load is the rolling load = P / cos θ,
Or a value approximating this, for example, the rolling load P3 =
P / cos θ3 or a value approximating this. By setting the rolling load corresponding to the roll angle θ or the roll contact width W in this manner, the surface pressure acting on the roll contact area A (see FIG. 7) (surface pressure = P / A) is kept substantially constant. be able to.

Next, a rolling method when the turntable is turned will be described. FIGS. 9A and 9B are fifth explanatory views of the rolling method according to the present invention. (A): Subsequently, the rolling means 60 is turned by the turntable 90, and the axis of the work roll 66 is set to be non-perpendicular to the longitudinal axis 81a of the strip 81. That is, the work roll 66 is set to the roll angle θ2 (the turning angle θ2), and the rolling load is set to P2 as shown in the diagram of FIG.

(B): Work rolls 64 and 66
And the left and right clamping means 32, 33 apply a constant tension to the strip 81 which reciprocates by the rotation of the work rolls 64, 66 at the roll angle θ2. The work rolls 64 and 66 repeat forward and reverse rotation to reciprocate the thickness difference portion 83,
The thickness difference portion 83 gradually becomes thinner, and the boundary line 86 becomes an angle θ.
Form 2

As described above, the rolling load is set according to the turning angle of the turntable. That is, the rolling load is
Rolling load P2 = P / cos θ according to roll angle θ2
2 or a value close to this, even if the roll angle θ changes from θ0 to θ2, the strip 81 can be rolled with a substantially constant force, and the thickness T2 of the thickness difference portion 83 is reduced. It can be formed uniformly.

Subsequently, the rolling means 60 is returned by the roll angle θ2 by the turntable 90 (see FIG. 2A), and is continuously rotated by the roll angle β (β = θ1) to set the rolling load to P1. To form the thickness difference portion 83 and change the angle of the boundary line 85 to β
Formed. Thus, the rolling load is equal to the roll angle θ1
Is set to P1 = P / cos θ1 or a value close thereto, so that the strip 81 can be rolled with a substantially constant force even if the roll angle θ changes, and the thickness difference portion The thickness T2 of 83 can be formed uniformly.

It should be noted that the inclination of the angles θ2 and β in FIG. 9 shown in the embodiment of the present invention is an example, and the angles are arbitrary. In the rolling method shown in FIG. 5, first, rolling is started with the turning angle θ set to 0 °, but the turning angle θ at the start is arbitrary. For example, the turning angle θ is set to 10 °, and thereafter, , The turning angle θ can be increased or decreased.

[0037]

According to the present invention, the following effects are exhibited by the above configuration. According to the first aspect, when a certain tension is applied to the strip while holding both ends of the strip with a pair of clamp means, and the strip is locally thinned by the upper and lower rolls of the rolling means placed on the turntable. When the turning angle of the turntable is θ, the turning angle θ is 0 ° when the upper and lower rolls are perpendicular to the longitudinal axis of the strip, and the rolling load is P when the turning angle is 0 °, The rolling load is set to (P / cos θ) or a value approximating this. In this case, by turning, the upper and lower rolls of the rolling means also have an angle θ, and if the angle θ of this roll is the roll angle θ, the rolling load gradually increases from P as the roll angle θ increases. (P / c
osθ) increases like the curve drawn. As a result, even if the roll angle θ changes, the force for extending the strip can be made substantially constant at any angle. Therefore, even if the rolling means is turned to form a locally thickened difference thickness portion,
The thickness of the thickness difference part can be formed uniformly.

[Brief description of the drawings]

FIG. 1 is a plan view of a production line used in a rolling method according to the present invention.

FIG. 2 is a side view of a production line used in the rolling method according to the present invention.

FIG. 3 is a perspective view of a tension device according to the present invention.

FIG. 4 is a perspective view of a rolling unit according to the present invention.

FIG. 5 is a first explanatory view of a rolling method according to the present invention.

FIG. 6 is a second explanatory view of the rolling method according to the present invention.

FIG. 7 is a third explanatory view of the rolling method according to the present invention.

FIG. 8 is a fourth explanatory view of the rolling method according to the present invention.

FIG. 9 is a fifth explanatory view of the rolling method according to the present invention.

FIG. 10 is an explanatory diagram of a rolling procedure of the rolling device proposed earlier.

[Explanation of symbols]

14 ... rolling device, 32 ... clamping means (left clamping means), 33 ... clamping means (right clamping means), 60 ...
Rolling means, 64: upper roll (work roll), 66: lower roll (work roll), 81: strip, 81a: longitudinal axis, 83: difference in thickness, 90: turntable, t: tension,
T2: The thickness of the difference thickness portion.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Masashin Numano 1-10-1, Shinsayama, Sayama City, Saitama Prefecture Honda Engineering Co., Ltd. F-term (reference) 4E002 AD11 BC06 BC10

Claims (1)

[Claims] 1. A rolling method in which a fixed tension is applied to a strip while holding both ends of the strip with a pair of clamping means, and the strip is locally thinned by upper and lower rolls of rolling means placed on a turntable. In the method, the turning angle of the turntable is θ, the turning angle θ is 0 ° when the upper and lower rolls are perpendicular to the longitudinal axis of the strip, and the rolling load of the rolling means is P when the turning angle is 0 °. In some cases, the rolling load is set to (P / cos θ) or a value close to (P / cos θ).